Flat Fresnel doublets made of PMMA and PC: combining low cost production and very high concentration ratio for CPV
- 8 April 2011
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 19 (103), A280-A294
- https://doi.org/10.1364/oe.19.00a280
Abstract
The linear chromatic aberration (LCA) of several combinations of polycarbonates (PCs) and poly (methyl methacrylates) (PMMAs) as singlet, hybrid (refractive/diffractive) lenses and doublets operating with wavelengths between 380 and 1600 nm – corresponding to a typical zone of interest of concentrated photovoltaics (CPV) – are compared. Those comparisons show that the maximum theoretical concentration factor for singlets is limited to about 1000 × at normal incidence and that hybrid lenses and refractive doublets present a smaller LCA increasing the concentration factor up to 5000 × and 2 × 106 respectively. A new achromatization equation more useful than the Abbé equation is also presented. Finally we determined the ideal position of the focal point as a function of the LCA and the geometric concentration which maximizes the flux on the solar cell.This publication has 8 references indexed in Scilit:
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